Spy Work (Stealthy Folks)

[Vincent Hack]

a woman from faerun traveled to the dune dimention, had a child, who was taken to become bene gesserit, the child then had Anduri's mother, who came out a tiefling

[Mace Parshath]

Mace doesn't seem to be as good with the sneaking around gig, but Laura can switch Shells and infiltrate the biggest known threat of an organization on Twanchea, Brent can do the second worst and try to assassinate some people

[Frederic Bourgault-Christie]

a woman from faerun traveled to the dune dimention, had a child, who was taken to become bene gesserit, the child then had Anduri's mother, who came out a tiefling

Why would she have done so? What motivated her to leave her native domain and to go to such an alien place? And how would she have had a child given the massive culture shock?

Mace doesn't seem to be as good with the sneaking around gig, but Laura can switch Shells and infiltrate the biggest known threat of an organization on Twanchea, Brent can do the second worst and try to assassinate some people

In TWANCHEN (not Twanchea), and there are plenty of contenders for "biggest known threat".